Lewis hallook nash



` (No Model.)

L. H. NASH.

PROPORTIONAL WATER METER.

-No.332;935. Patented Dec. 22, 1885;

UNITED STATES PATENT OFFICE,

LEWIS HALLOCK NASH, OF BROOKLYN, ASSIGNOR TO THE NATIONAL METER COMPANY, OF NEW YORK, N. Y. i I

PRO PO RTI ONAL WATER- M ETER.

SPECIFICATION forming part of Letters Patent No. 332.935, dated December 22, 1885.

Application filed April 17, 1885.

To all whom it may concern:

`Be it known that I, LEwIs HALLOOK NAsH,

a citizen of the United States, residing at Brooklyn, in the County of Kings and State of New York, have invented new and useful Improvements in Proportional WVater-Meters, of which the following is a specification.

This invention relates to devices for measuring water flowing through a pipe in which the volune is divided at the inlet into two streans, one of which only passes through the chamber containing the working and registering mechanism in such determined relation to the other stream as to represent a given and definite proportion of the entire volune, and the indicator should show the measurement of the whole passing Volume.

In the organization of my improved meter my object is to equalize the resistance to the flow of the divided streans by a device of simple and compact construction,enbracing,as co-operating elements, a receiving chaniber for the nonmetered stream having separate current, diverti ngand retarding concentric passages conmunicating with the discharge by a valved port, a supplemental chamber containing abutments placed in -radial relation to each other, communicating with the valved port and with the dischargc, and a measuring device communicating with the infiuent passage of the main chamber and with the efflnent passage of the supplemental chamber, whereby to produce a -esistance to the flow in the communicating chanbers in proportion to the amount of the flow, and to overcome by the function of the valve the resistance due to the friction of the moving part s of the measure-indicating devices under small velocities of flow.

The advantages of the circular form of the chamber-passages are that it gives a tangential inlet to the receiving-chamber, and thereby a circular direction to the infiow, an increased surface-resistance to the flow through the non-metered chanber, and a radial outlet' to discharging-chamber. r

The advantages of measuring a part only of the whole Volume passing through a meter to give the sum of the whole Volume are that it adrnits of the use of more sensitive measuring mechanism, effects a more accurate measure Serial No. 162.583. (No model.)

ment, and permits the use of a comparatively small meter for a large supply of water to the service-pipe.

I do not claim, broadly, a retarding-passage in a water-main, nor the combnation of current diverting and retarding passages in the main with a measuring device operated by a division of the inflow Volume.

The accompanying drawings illustrate my said water-measuring device as applied tothe 6o indicating device known as a meter, in which- Figure l represents a vertical longitudinal section, the working device being seen in ele- Vation; Fig. 2, a horizontal section taken on 65,

the line a; m of Fig. l, showing the mechanical obstructions in the discharge-comuunicating passage; Fig. 3, a sinilar section taken on the line y 3 of Fig. l, showing the series of current-diverting passages conniunicating with the inlet.

My improved measuring device is not confined in its application to any particular construction of working devices for Operating the indicator mechanism, which is arranged in what is known as the meter," theinclosingcase G of which I have shown in elevation as connecting with the inferential current.

The measuring device proper consists of a shell, A,forined like pipe-fittings, independent of the meter-case G, and divided into two passages or chanibcrs, C and D, which 'communicate with each other by a central valved open ing, n, which forms the discharge f'on the receiving current-diverting passages. The inlet-passage a and the outlet passage E are preferably of equal area, and the forner communicates with the working-chamber of the indicator device by a pipe, F, and with the series of current-diverting passages having a 9 valved outlet, whereby the Volume of the inflow is divided at the inlet. The metered passage c comnunicates with the passage E at a point outside of the mechanical obstructions of the chamber D, so that the flow fron the meter G to the service-pipe will be unaffected by the retarding action of the current in the chamber.

- The current-diverting passages in the eX- ample shown are of circular form, and consist IOO of one or more separate passages, a', leading from the nlet-passagea into a central chanber, 06 by a side opening, a the said chanber, by a central Valved opening, communicating with the upper ehanber, D, wherein is placed a series of impediments or abutments, e, arranged to allow the current to flow between and around them direct to the outlet-passage. The valve b is a disk placed in the upper chamber, D, and tends to close by its weight over the port a, and it is maintained in position by a sten seated in a guide rising from the bottom of the chamber a and the function of this valve I will explain presently.

The water flowing into the passage a is divided into separate streans, each flowing through separate passages, as stated. By the laws of the flow of water the quantity that will flow through these separate passages will be inversely proportional to the resistance offered to its movement, and these resistances increase as the square of the velocity of the Currents. Now, the water passing through the passage c and the meter G` will encounter a certain resistance to its flow, depending on the dinensions and shape of the passage and of the meter used.

In order that the flow in the main passages a' a a shall have a p'oportionate resista'ce, it is necessary to provide for as great resistance to the flow therein as is offered to the flow through the meter; andfor this purposeI provide the series ot' current-diverting channels and inpediments adapted to offer the required amount of frictional resistance to the passage of the water. In this provision of equalizing the resistance to the flow of the separate currents it is not important as to the shape or Construction.

Besides the resis ance in the meter due to the hydraulic f'iclion of the flowing streams, there is also a resistance due to the moving parts of the measure indicating devices. To provide for this I introduce the weighted valve b, which tends to close some portion of the main passage, as at a, the weight of the valve being just enough to counterbalance the 2. The combination of a water-measuring' device, G,with a chanber-section of the waternain having one or more connunicati ng circular passages, a', in the same p1ane,supplemented by a chamber. ai having radial abutments e, and communicating with said circular passages, substantially as described, or the purpose specified.

3. The conbination, in a water-meter, of a shell having areceivingand discharging chan ber fol-med with current diverting and retarding passages, with a valved connunicating opening and a metered passage commnnicating with the discharge'-chanber outsle of the current-retarding passages, substantially as described, for the purpose specified.

4. The combinalion, in a water-meter, of a shell having the obstructed passages a' a" a of, with the connunicating porta and a metered passage, c, which receives a division of the volune to be measured, substantially as described, for the purpose specified. i

5. In a water-meter, the conbnation, with the working and registerng devce reoeiving a division of the Volume to be measured, of a nain chanber adapted to resist the flow of IOO tangential inlet and the discharging-chamber a radial outlet, in combination with a measuring clevice operated by the division of the infiow volune, substantially as herein set forth. In testi mony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

LEWIS HALLOGK NASH.

VVitnesses:

I-I. WV. BRINOKERHOFF,

WILLIAM C. WESTERVELT. 

